Wrap Text
High copper grades from in-fill drilling at Prieska
Orion Minerals Limited
Incorporated in the Commonwealth of Australia
Australian Company Number 098 939 274
ASX share code: ORN
JSE share code: ORN
ISIN: AU000000ORN1
High copper grades from in-fill drilling of the +105 Level Crown Pillar support early production
at Prieska
Outstanding shallow intercepts of up to 7.46m at 9.24% Cu within the Supergene Inferred Resource
- Excellent results received from recently completed in-fill drilling targeting the supergene
mineralisation in the shallow +105 Level Crown Pillar at the Prieska Copper-Zinc Project in South
Africa.
- The drilling was designed to upgrade an area of Inferred Resource to the Indicated Resource
classification, as part of ongoing feasibility studies on the Early Production Strategy.
- Significant assays received to date include 7.46m at 9.24% Cu, 0.19% Zn, 0.44g/t Au and 17.46g/t
Ag in OCOU164 and 12.53m at 4.89% Cu, 0.04% Zn, 0.51g/t Au and 15.12g/t Ag in OCOU155.
- A total of 14 in-fill holes were completed for 917.87m of drilling.
- Final assay results are awaited, before a re-estimation of the resource is undertaken.
Orion’s Managing Director and CEO, Errol Smart, commented:
“The in-fill drilling has confirmed and exceeded our expectations, returning outstanding widths and grades
of high-grade copper sulphide mineralisation within the +105 Level Crown Pillar. This is a great result for our
team. At face value, the grades intersected to date mostly exceed that of the average grade of the
standing Inferred Resource estimate, making the early start of mining via an open pit an increasingly
attractive opportunity.
Our Early Production Strategy aims to target the open pit and remnant pillars while dewatering is
undertaken on Prieska Deeps. These results provide strong support for that strategy, with the higher-than-
expected grades also opening up the possibility that we may be able to undertake shallow underground
mining in the early phases of the development, further optimising financial returns. Work is continuing as
part of the ongoing feasibility studies to determine the optimal approach.”
Orion Minerals Limited (ASX/JSE: ORN) (Orion or Company) is pleased to advise that it has received highly
encouraging initial assay results from an in-fill drilling program designed to upgrade the existing shallow
Inferred Resource in the +105 Level Crown Pillar area at its flagship Prieska Copper-Zinc Project in South
Africa’s Northern Cape Province.
A total of fourteen in-fill holes were completed for a total of 917.87m, designed to upgrade the existing
Inferred supergene Resource of 0.63Mt at 2.2% Cu and 1.8% Zn (refer ASX/JSE release 15 January 2019)¹ to
the higher confidence Indicated category as part of ongoing feasibility studies on the Early Production
Strategy. This supergene Inferred Resource forms part of the overall Resource of 1.76Mt at 1.5 % Cu and
2.0% Zn (refer ASX/JSE release 15 January 2019)¹ for the +105 Level Crown Pillar area.
Drilling intersected higher-than-expected copper grades in several of the holes. Once final results are
received, the orebody model will be updated, and the Resource will be re-estimated. The sampling density
achieved is anticipated to allow an Indicated classification, adding to the existing Indicated Resource of
0.62Mt at 1.54% Cu and 3.05% Zn (refer ASX/JSE release 15 January 2019)¹.
+105 Level Resource In-fill Drilling Program
The drilling program was designed to in-fill an Inferred Resource area in the +105 Level Crown Pillar
supergene mineralised zone to upgrade it to Indicated Resource classification.
Fourteen holes totalling 917.87m successfully intersected the mineralised zone with an additional five holes
abandoned due to poor ground conditions and unacceptable core loss. Assay results have been received
for thirteen of the fourteen holes, with final assays for the last intersection expected shortly.
Results received to date have confirmed the presence of enriched copper and gold mineralisation in the
previously drilled supergene mineralisation which is currently classified as an Inferred Resource due to the
wider-spaced drilling. The zinc grades confirm that zinc is depleted in the supergene zone.
The orebody model is currently being updated and the Resource will be re-estimated and re-classified
where appropriate.
An area of geotechnical collapse into underlying mining voids was also confirmed as being confined to a
small zone with less than 10% of the mineralised strike affected.
Figure 1: Long section through the PCZM showing the location of the +105 Level Crown Pillar supergene Inferred Resource area.
_________________________
¹ Mineral Resource reported in ASX release of 15 January 2019: “Prieska Total Mineral Resource Exceeds 30Mt @ 3.7% Zn and 1.2% Cu
Following Updated Open Pit Resource” available to the public on www.orionminerals.com.au/investors/asx-jse-announcements.
Competent Person Orion’s exploration: Mr. Errol Smart. Competent Person: Orion’s Mineral Resource: Mr. Sean Duggan. Orion confirms
it is not aware of any new information or data that materially affects the information included above. For the Mineral Resources, the
company confirms that all material assumptions and technical parameters underpinning the estimates in the ASX release of 15 January
2019 continue to apply and have not materially changed. Orion confirms that the form and context in which the Competent Person’s
findings are presented here have not materially changed.
Figure 2: Long section through the +105 Level Crown Pillar supergene Resource showing 2022 drilled area and historical drilling
intercepts.
Figure 3: Cross section showing drill holes OCOU164 and V09 intercepts.
Figure 4: Cross section showing drill holes OCOU151 and OCOU155 intercepts.
Results
In-fill drill holes have returned high-grade copper intersections including:
• 7.46m at 9.24% Cu, 0.19% Zn, 0.44g/t Au, 17.46g/t Ag from 45.50m in OCOU164.
• 12.53m at 4.89% Cu, 0.04% Zn, 0.51g/t Au, 15.12g/t Ag from 43.52m in OCOU155.
• 6.05m at 5.52% Cu, 1.83% Zn, 0.26g/t Au, 17.18g/t Ag from 45.00m in OCOU142.
• 6.25m at 1.54% Cu, 0.16% Zn, 0.17g/t Au, 6.62g/t Ag from 62.00m in OCOU151.
• 3.10m at 2.10% Cu, 0.81% Zn, 0.25g/t Au, 6.76g/t Ag from 51.00m in OCOU148.
• 3.40m at 6.91% Cu, 0.07% Zn, 0.21g/t Au, 4.84g/t Ag from 58.00m in OCOU156.
All results are summarised in Table 1 below.
Table 1: Summary table of all PCZM +105 Level Crown Pillar supergene Resource assay results to date for 2022 drilling program.
(a minimum cut-off of 0.3 Cu% and 0.4% Zn with maximum 3m internal waste allowed). No capping of data.
Depth (m) Intersection
Hole ID width (m) Cu % Zn % Au g/t Ag g/t
From To
OCOU141 50.65 57.60 6.65 1.88 0.24 0.21 7.28
OCOU142 45.00 51.40 6.05 5.52 1.83 0.26 17.18
OCOU143 46.60 47.60 1.00 0.81 1.01 0.18 13.00
OCOU143 49.50 53.00 3.50 0.29 0.34 0.17 3.86
OCOU144 48.54 50.50 1.96 1.23 0.10 0.06 1.49
OCOU145 56.90 62.00 5.10 1.00 2.28 0.14 7.80
OCOU148 51.00 54.10 3.10 2.10 0.81 0.25 6.76
OCOU150 51.50 53.65 2.15 1.62 4.53 0.26 8.84
OCOU151 62.00 68.25 6.25 1.54 0.16 0.17 6.62
OCOU155 43.52 59.02 12.53 4.89 0.04 0.51 15.12
OCOU156 58.00 64.55 3.40 6.91 0.07 0.21 4.84
OCOU160 51.00 54.50 3.50 0.09 0.93 0.06 0.50
OCOU164 45.50 59.40 7.46 9.24 0.19 0.44 17.46
OCOU166 46.10 53.00 4.55 3.21 0.45 0.11 2.80
The updated Mineral Resource estimates will be used for open-pit optimisation and updated Reserve
estimation. The open pit, originally planned for mining after completion of the deeps underground mining,
is now being evaluated for early mining, concurrent with the dewatering of the deeps.
For and on behalf of the Board.
Errol Smart
Managing Director and CEO
11 July 2022
ENQUIRIES
Investors Media JSE Sponsor
Errol Smart – Managing Director & CEO Nicholas Read Monique Martinez
Denis Waddell – Chairman Read Corporate, Australia Merchantec Capital
T: +61 (0) 3 8080 7170 T: +61 (0) 419 929 046 T: +27 (0) 11 325 6363
E: info@orionminerals.com.au E: nicholas@readcorporate.com.au E: monique@merchantec.co.za
Competent Persons Statement
The information in this report that relates to Orion’s Exploration Results at the Prieska Copper Zinc Mine Project is
reported in accordance with the 2012 Edition of the Australasian Code for Reporting of Exploration Results, Mineral
Resources and Ore Reserves (JORC Code) and has been compiled and assessed under the supervision of Paul
Matthews, Orion Minerals Mineral Resource Manager, a Competent Person who is a Professional Natural Scientist
(Pr.Sci.Nat.) registered with the South African Council for Natural Scientific Professionals, a Recognised Professional
Organisation (RPO). Mr Matthews, as Orion Minerals Mineral Resource Manager, is a full-time employee of the
company. Mr Matthews confirms there is no potential for a conflict of interest in acting as the Competent Person. Mr
Matthews has sufficient experience that is relevant to the style of mineralisation and type of deposit under
consideration and to the activity being undertaken to qualify as a Competent Person as defined in the 2012 Edition of
the JORC Code. Mr Matthews (Pr.Sci.Nat) consents to the inclusion in this announcement of the matters based on his
information in the form and context in which it appears.
Disclaimer
This release may include forward-looking statements. Such forward-looking statements may include, among other
things, statements regarding targets, estimates and assumptions in respect of metal production and prices, operating
costs and results, capital expenditures, mineral reserves and mineral resources and anticipated grades and recovery
rates, and are or may be based on assumptions and estimates related to future technical, economic, market, political,
social and other conditions. These forward-looking statements are based on management’s expectations and beliefs
concerning future events. Forward-looking statements inherently involve subjective judgement and analysis and are
necessarily subject to risks, uncertainties and other factors, many of which are outside the control of Orion. Actual results
and developments may vary materially from those expressed in this release. Given these uncertainties, readers are
cautioned not to place undue reliance on such forward-looking statements. Orion makes no undertaking to
subsequently update or revise the forward-looking statements made in this release to reflect events or circumstances
after the date of this release. All information in respect of Exploration Results and other technical information should be
read in conjunction with Competent Person Statements in this release (where applicable). To the maximum extent
permitted by law, Orion and any of its related bodies corporate and affiliates and their officers, employees, agents,
associates and advisers:
• disclaim any obligations or undertaking to release any updates or revisions to the information to reflect any
change in expectations or assumptions;
• do not make any representation or warranty, express or implied, as to the accuracy, reliability or completeness
of the information in this release, or likelihood of fulfilment of any forward-looking statement or any event or
results expressed or implied in any forward-looking statement; and
• disclaim all responsibility and liability for these forward-looking statements (including, without limitation, liability
for negligence).
Appendix 1 - Drill hole collar and intersection information from drill program at Prieska Copper-Zinc Project
Table 2: Collar table of 2022 PCZM +105 Level Crown Pillar supergene Resource drilling.
LO23 WGS84
Hole ID Dip Azimuth Depth Comments
Easting Northing Elevation
OCOU141 -68,523.15 -3,314,406.88 976.74 38.60 28.00 57.60 Collar Survey
OCOU142 -68,388.06 -3,314,476.31 974.17 33.70 37.00 71.51 Collar Survey
OCOU143 -68,523.27 -3,314,406.65 976.70 36.35 30.00 59.39 Collar Survey
OCOU144 -68,334.77 -3,314,505.10 972.76 9.69 35.00 67.74 Collar Survey
OCOU145 -68,522.87 -3,314,405.66 975.53 11.81 30.00 74.56 Collar Survey
OCOU147 -68,336.01 -3,314,506.50 974.00 42.28 20.00 46.89 Abandoned, no intercept
OCOU148 -68,482.39 -3,314,426.90 976.26 48.60 27.00 65.00 Collar Survey
OCOU150 -68,443.69 -3,314,443.91 974.00 10.78 21.00 54.50 Provisional coordinate only,
pending collar survey
OCOU151 -68,263.82 -3,314,542.40 973.00 19.90 25.00 70.67 Provisional coordinate only,
pending collar survey
OCOU155 -68,263.82 -3,314,542.40 974.00 44.97 25.00 63.02 Provisional coordinate only,
pending collar survey
OCOU156 -68,443.69 -3,314,443.91 974.00 48.34 21.00 67.70 Provisional coordinate only,
pending collar survey
OCOU157 -68,350.19 -3,314,498.30 974.00 32.00 32.00 52.10 Abandoned, no intercept
OCOU160 -68,443.69 -3,314,443.91 974.00 33.00 32.00 62.09 Provisional coordinate only,
pending collar survey
OCOU163 -68,418.46 -3,314,461.10 974.00 50.00 24.00 42.30 Abandoned, no intercept
OCOU164 -68,309.27 -3,314,519.43 972.62 40.00 25.00 75.00 Provisional coordinate only,
pending collar survey
OCOU166 -68,418.46 -3,314,461.10 974.00 50.00 45.00 66.31 Provisional coordinate only,
pending collar survey
OCOU167 -68,248.55 -3,314,550.07 974.00 47.00 55.00 39.56 Abandoned, no intercept
OCOU168 -68,543.00 -3,314,396.00 976.60 32.90 40.00 62.78 Provisional coordinate only,
pending collar survey
OCOU169 -68,248.55 -3,314,550.07 974.00 53.00 58.00 42.88 Abandoned, no intercept
Appendix 2: The following tables are provided in accordance with the JORC Code (2012) requirements for the reporting of Exploration Results from the
Prieska Copper Zinc Mine.
Section 1 Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections.)
Criteria JORC Code explanation Commentary
Sampling techniques • Nature and quality of sampling (e.g. cut channels, random chips, or • Sampling was carried out under supervision of the Project Geologist
specific specialised industry standard measurement tools appropriate and using industry standard procedures.
to the minerals under investigation, such as down hole gamma sondes, • Diamond core was cut at the core yard and half core taken as the
or handheld XRF instruments, etc.). These examples should not be taken sample.
as limiting the broad meaning of sampling. • In friable mineralised zones where core splitting was not possible, half
• Include reference to measures taken to ensure sample representivity of the broken friable material was sampled using a spoon and
and the appropriate calibration of any measurement tools or systems scraper. In three holes all of the friable core, i.e., full core, was
used. sampled.
• Aspects of the determination of mineralisation that are Material to the • Diamond core was sampled at 1m intervals where possible, sample
Public Report. lengths were adjusted to ensure samples do not cross geological
• In cases where ‘industry standard’ work has been done this would be boundaries or other features and adjusted where core loss was
relatively simple (e.g. ‘reverse circulation drilling was used to obtain 1 m encountered.
samples from which 3 kg was pulverised to produce a 30 g charge for • Sampling was undertaken under the supervision of a qualified
fire assay’). In other cases more explanation may be required, such as geologist and intervals were selected based on mineralogy, textures
where there is coarse gold that has inherent sampling problems. and concentrations of specific minor minerals. A handheld Niton XL2
Unusual commodities or mineralisation types (e.g. submarine nodules) XRF Analyser instrument was used to assist with determining areas for
may warrant disclosure of detailed information. sampling.
• Quality control samples were inserted in accordance with SOPs and
under the direct supervision of a geologist at pre-determined points
within the sampling stream.
• 20cm-length samples were selected for bulk density determination
based on lithological variation for all mineralised zones sampled. The
wax method with water immersion was used to determine bulk density
in friable or oxidised zones whilst for solid core the standard water
immersion method was used.
Drilling techniques • Drill type (e.g. core, reverse circulation, open-hole hammer, rotary air • All underground drilling was diamond core with NQ core size using a
blast, auger, Bangka, sonic, etc.) and details (e.g. core diameter, triple triple tube core barrel to improve core recovery in soft formations.
or standard tube, depth of diamond tails, face-sampling bit or other • Core is not orientated.
type, whether core is oriented and if so, by what method, etc.). • Continuous core drilling method was utilised.
Drill sample recovery • Method of recording and assessing core and chip sample recoveries • Depth blocks were inserted by the driller and the geologist regularly
and results assessed. cross checked depths by counting the number of rods.
• Measures taken to maximise sample recovery and ensure • A block with the depth of the hole written on it was placed in the core
representative nature of the samples. box at the end of each run.
• Whether a relationship exists between sample recovery and grade and • At the core yard, the length of core in the core box was measured for
whether sample bias may have occurred due to preferential loss/gain each run. The measured length of core was divided by drilled depth
of fine/coarse material. to determine the percentage core recovery. Secondly, the measured
length was subtracted from the length of the run to determine the
core lost.
• A triple tube core barrel was used to minimise the core loss within the
mineralised zone and hanging wall formations.
• Core loss was significant in some instances in the soft weathered or
friable formations (oxides, breccia zones, supergene ore and clay
zones). All core loss was recorded. The average core recovery within
the supergene ore zone was 83%.
• No significant relationship exists between sample recovery and grade.
Logging • Whether core and chip samples have been geologically and • Core of the entire hole length was geologically logged and recorded
geotechnically logged to a level of detail to support appropriate on standardised log sheets by qualified geologists.
Mineral Resource estimation, mining studies and metallurgical studies. • All intersections were logged.
• Whether logging is qualitative or quantitative in nature. Core (or • Qualitative logging of colour, grainsize, weathering, structural fabric,
costean, channel, etc.) photography. lithology, alteration type and mineralogy was carried out.
• The total length and percentage of the relevant intersections logged. • After logging the information was entered into digital templates at the
project office.
• The core for the entire drill hole length was photographed and saved
in a dedicated folder on the server.
Sub-sampling • If core, whether cut or sawn and whether quarter, half or all core taken. • One metre sample lengths were taken in most cases with exception
techniques and • If non-core, whether riffled, tube sampled, rotary split, etc. and whether where there was core loss leading to a return of less than 1m on
sample preparation sampled wet or dry. successive 1.5m runs. In the latter case the maximum of returned core
• For all sample types, the nature, quality and appropriateness of the was sampled.
sample preparation technique. • With competent core samples, the entire sample length was cut, and
• Quality control procedures adopted for all sub-sampling stages to one half sampled.
maximise representivity of samples. • In friable ore where core splitting was not possible, half of the broken
• Measures taken to ensure that the sampling is representative of the in friable material was sampled using a spoon and scraper. In the case
situ material collected, including for instance results for field of friable core in three of the holes, all sample (full core) was sent to
duplicate/second-half sampling. the laboratory as it was considered that too much bias may be
• Whether sample sizes are appropriate to the grain size of the material introduced by scooping.
being sampled. • Core samples were generally dry except for a few runs in friable zones.
• One laboratory ALS Chemex PTY LTD (ALS) was used for this drill
campaign. ALS has SANAS accreditation.
• Samples submitted were dried and crushed to 70% < 2mm and then
pulverised to 85% < 75 microns.
• Coarse Blanks were inserted at the beginning and end of each batch.
• Due to the poor quality of the core and difficulty to cut half core into
quarter core only a few (six) field duplicates could be taken.
• The Competent Person considers this number of duplicates adequate
considering the condition of the sample and the scale of the drill
programme.
• The six duplicate samples showed excellent accuracy and precision
for Cu and Zn.
Quality of assay data • The nature, quality and appropriateness of the assaying and laboratory • Samples submitted to ALS were analysed for base metals, Au and Ag.
and laboratory tests procedures used and whether the technique is considered partial or Analysis was by the Inductively Coupled Plasma and Optical Emission
total. Spectroscopy (ICP-OES) methodology, using aqua regia digest. These
• For geophysical tools, spectrometers, handheld XRF instruments, etc., are appropriate analysing techniques for base metals.
the parameters used in determining the analysis including instrument • Quality control samples were inserted, under the direct supervision of
make and model, reading times, calibrations factors applied and their a geologist, at pre-determined points within the sampling stream.
derivation, etc. • A total of total of 43 CRMs and 19 Blanks were inserted. Two CRMs
• Nature of quality control procedures adopted (e.g. standards, blanks, were used. OREAS624 (3.09%Cu, 2.4% Zn) and OREAS622 (0.484% Cu,
duplicates, external laboratory checks) and whether acceptable levels 10.01% Zn). All check samples returned acceptable results within two
of accuracy (i.e. lack of bias) and precision have been established. Standard Deviations of the CRM average.
Verification of • The verification of significant intersections by either independent or • The drilling and sampling was supervised by experienced geologists.
sampling and alternative company personnel. • Core recovery, density data, sampling data and geological logs are
assaying • The use of twinned holes. documented in the core yard onto standard paper templates
• Documentation of primary data, data entry procedures, data provided by the company.
verification, data storage (physical and electronic) protocols. • Data entry from the primary hard copies was done on Excel
• Discuss any adjustment to assay data. spreadsheets by the geologists logging the core. The data was then
imported into an Access database by the geologist responsible for the
database. Validation of the data was done during importing into the
Access database by running queries, and when importing the data
into to 3D modelling software.
• No twinning of holes has been done.
• No adjustments have been made to the assay data.
Location of data • Accuracy and quality of surveys used to locate drill holes (collar and • Underground drill hole collar positions were laid out by a qualified
points down-hole surveys), trenches, mine workings and other locations used surveyor using a Trimble VX Total Station unit.
in Mineral Resource estimation. • After completion of drilling, five collars were resurveyed by a qualified
• Specification of the grid system used. surveyor using a Trimble VX Total Station unit. Fourteen drill hole collars
• Quality and adequacy of topographic control. are scheduled to be resurveyed.
• Downhole surveys of the diamond drill holes were completed using a
Reflex EZ Gyro TM (north-seeking gyro instrument).
• All survey data is in the WGS84 ellipsoid in the WG23 Zone with the
Hartebeeshoek 1994 Datum. The coordinates are also supplied in
Clarke 1880 and in UTM WGS84 Zone 34 (Southern Hemisphere).
Data spacing and • Data spacing for reporting of Exploration Results. • Drilling was carried out on approximately 45m spaced lines along
distribution • Whether the data spacing and distribution is sufficient to establish the strike. There were, however, a few holes drilled in between these lines
degree of geological and grade continuity appropriate for the Mineral where it was considered necessary.
Resource and Ore Reserve estimation procedure(s) and classifications • The drill data spacing is considered sufficient for the objective of
applied. classifying an Indicated Resource.
• Whether sample compositing has been applied. • No sample compositing has been applied before assaying.
Orientation of data in • Whether the orientation of sampling achieves unbiased sampling of • Where access allowed, drilling was oriented perpendicular, or at a
relation to geological possible structures and the extent to which this is known, considering the maximum achievable angle to the attitude of the mineralisation.
structure deposit type. • Drilling was executed from the 105 Level footwall drive. All holes were
• If the relationship between the drilling orientation and the orientation of inclined upwards.
key mineralised structures is considered to have introduced a sampling • No sampling bias is anticipated as a result of hole orientations.
bias, this should be assessed and reported if material.
Sample security • The measures taken to ensure sample security. • Access to drill sites was limited to responsible persons, with close
supervision of the unloading of the core tube and transportation of
core to the core yards. The core yard is enclosed by a security fence,
the access gate of which is always locked when personnel are not on
the premises.
• Sample shipments are controlled by the geologists. Samples are sent
with a trackable courier service to the ALS laboratory in
Johannesburg. Sample shipments were accompanied with
appropriate sign off documentation to ensure all samples were
received in good order.
• The chain of custody was managed by Orion personnel. Samples
were stored on site in a secure locked building and then freighted
directly to the laboratory.
Audits or reviews • The results of any audits or reviews of sampling techniques and data. • No audits or reviews have been carried out in reference to this
resource infill drilling campaign.
Section 2 Reporting of Exploration Results
(Criteria listed in the preceding section also apply to this section.)
Criteria JORC Code explanation Commentary
Mineral tenement • Type, reference name/number, location and ownership including • The Mining Right is held by Prieska Copper Zinc Mine (Pty) Ltd (PCZM),
and land tenure agreements or material issues with third parties such as joint ventures, which is a wholly owned subsidiary of Orion. Orion effectively holds a
status partnerships, overriding royalties, native title interests, historical sites, 70.00% interest in the project.
wilderness or national park and environmental settings. • The Mining Right covers the complete known strike of the +105 Level
• The security of the tenure held at the time of reporting along with any resource.
known impediments to obtaining a licence to operate in the area. • +105 Level resource is located on Portion 26 of the farm Vogelstruis-
Bult 104.
Exploration done by • Acknowledgment and appraisal of exploration by other parties. • Drilling in 2012 of the north-western section of the +105 Level resource
other parties was carried out by the previous owners of Prieska Copper Zinc Mine
(formerly Repli Trading No 27 (Pty) Ltd) (Orion acquired the subsidiary
in March 2017).
Geology • Deposit type, geological setting and style of mineralisation. • The Copperton deposit is a Volcanogenic Massive Sulphide (VMS)
deposit which is situated in the southernmost exposures of the north-
northwest trending Kakamas Terrain, which forms part of the Mid-
Proterozoic Namaqualand Metamorphic Complex.
• The deposit is hosted by the Copperton Formation of the Areachap
Group. The Areachap Group also hosts several other but smaller VMS
deposits such as the Areachap, Boksputs, Kantien Pan, Kielder, and
Annex Vogelstruisbult deposits.
• The structural sequence at the mine consists of a footwall Smouspan
Gneiss Member, Prieska Copper Mines Assemblage (PCMA), which
hosts the sulphide mineralisation, and the hanging wall Vogelstruisbult
Gneiss Member.
• The historically mined section of the deposit is confined to a tabular,
stratabound horizon in the north-eastern limb of an overturned, south-
west verging synform, the axis of which plunges at approximately 5°
to the south-east.
• On surface the mineralised zone has a strike of 2,400m, was oxidised
and affected by leaching and supergene enrichment to a depth of
approximately 100m. It has a dip of between 55° and 80° to the
northeast at surface and a strike of 130° to the north. The width of the
mineralised zone exceeds 35m in places but averages between 7m
and 9m. The mineralised zone persists to a depth of 1,100m (as deep
as 1,200m in one section) after which it is upturned in a synformal
closure.
• The +105 Level resource area comprises the oxide/supergene/mixed
zones (and a zone of remnant primary sulphides) situated from above
up to surface. This zone of oxide and supergene mineralisation has a
strike length of 867m.
Drill hole Information • A summary of all information material to the understanding of the • All drilling information is available and has been compiled digitally.
exploration results including a tabulation of the following information for • A summary of the drill hole collar information is given in Table 2 in the
all Material drill holes: Appendix.
o easting and northing of the drill hole collar
o elevation or RL (Reduced Level – elevation above sea level in
metres) of the drill hole collar
o dip and azimuth of the hole
o down hole length and interception depth
o hole length.
• If the exclusion of this information is justified on the basis that the
information is not Material and this exclusion does not detract from the
understanding of the report, the Competent Person should clearly
explain why this is the case.
Data aggregation • In reporting Exploration Results, weighting averaging techniques, • All drilling information is available and has been compiled digitally.
methods maximum and/or minimum grade truncations (e.g. cutting of high • All intersections >1m and >0.3% copper or >0.4% zinc were quoted in
grades) and cut-off grades are usually Material and should be stated. public reporting.
• Where aggregate intercepts incorporate short lengths of high grade • No truncations have been applied.
results and longer lengths of low grade results, the procedure used for • No metal equivalent values were applied.
such aggregation should be stated and some typical examples of such • Weighted grades were calculated as follows; %Cu x sample length x
aggregations should be shown in detail. Bulk Density.
• The assumptions used for any reporting of metal equivalent values • No capping of assay results was carried out.
should be clearly stated.
Relationship between • These relationships are particularly important in the reporting of • All intersection widths quoted are down hole widths and not
mineralisation widths Exploration Results. corrected for true width.
and intercept lengths • If the geometry of the mineralisation with respect to the drill hole angle • Most holes intersected the mineralisation perpendicular or at a high
is known, its nature should be reported. angle to the attitude of the mineralisation.
• If it is not known and only the down hole lengths are reported, there • Generally, drill hole inclination ranged between +9° to +53° while the
should be a clear statement to this effect (e.g. ‘down hole length, true mineralisation is expected to dip close to 48°.
width not known’).
Diagrams • Appropriate maps and sections (with scales) and tabulations of • Refer to body of the announcement for plans, sections and tables.
intercepts should be included for any significant discovery being • Drilling data and progress was monitored in Micromine and modelled
reported. These should include, but not be limited to a plan view of drill in 3D incorporating historical and current drill data.
hole collar locations and appropriate sectional views.
Balanced reporting • Where comprehensive reporting of all Exploration Results is not • All drilling information is available and has been compiled digitally.
practicable, representative reporting of both low and high grades • Drill hole results for assays received to date (average grade per
and/or widths should be practiced to avoid misleading reporting of intersection) are summarised in Table 1.
Exploration Results. • In the Competent Person’s opinion, the Exploration Results reported in
this announcement have been reported in a balanced manner.
Other substantive • Other exploration data, if meaningful and material, should be reported • The Company’s previous ASX releases have detailed information
exploration data including (but not limited to): geological observations; geophysical pertaining to the past drilling by third parties and Orion within the
survey results; geochemical survey results; bulk samples – size and Supergene mineralisation and associated resource estimation carried
method of treatment; metallurgical test results; bulk density, out.
groundwater, geotechnical and rock characteristics; potential • Hardcopy maps are available for a range of other exploration data.
deleterious or contaminating substances. This includes mine survey plans, geological maps, airborne magnetics,
ground magnetics, electromagnetics, gravity and induced
polarisation.
• The Prieska Copper Mine operated from 1972 to 1991 and is reported
to have milled a total of 45.68 Mt of ore at a grade of 1.11% copper
and 2.62% zinc, recovering 0.43 Mt of copper and 1.01 Mt of zinc.
Further work • The nature and scale of planned further work (e.g. tests for lateral • No additional drilling is planned.
extensions or depth extensions or large-scale step-out drilling). • Metallurgical test work is scheduled as soon as all assays have been
• Diagrams clearly highlighting the areas of possible extensions, including received.
the main geological interpretations and future drilling areas, provided • Update of geological model will be finalised on receipt of final assay
this information is not commercially sensitive. results.
• Re-estimation work will commence on update of geological model
with re-classification of resources under the JORC Code, 2012
guidelines.
Date: 11-07-2022 08:12:00
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